[TASK] add icons to add new user and improve ui in setting a fixed height in activity log

templates/admin/user/index.html.tera

@@ -12,13 +12,13 @@
                 <div class="grid sm:grid-cols-3 gap-3 mt-3">
                       <button type="button"
                               onclick="document.getElementById('add-clubuser').showModal()"
-                              class="btn btn-primary">Vereinsmitglied</button>
+                              class="btn btn-primary">🥳 Vereinsmitglied</button>
                       <button type="button"
                               onclick="document.getElementById('add-scheckbuch').showModal()"
-                              class="btn btn-dark">Scheckbuch</button>
+                              class="btn btn-dark">🧑‍🏫 Scheckbuch</button>
                       <button type="button"
                               onclick="document.getElementById('add-schnupperkurs').showModal()"
-                              class="btn btn-dark">Schnupperkurs</button>
+                              class="btn btn-dark">👨‍🎓 Schnupperkurs</button>
 
 
                       </div>